Time: 20:00
Important one liner (Current)
- Electric current is the flow of electric charge through a conductor.
- Current is measured in amperes (A) in the SI system.
- Conventional current flows from positive to negative terminals.
- Electron flow is opposite to conventional current direction.
- Metallic conductors carry current via free electron movement.
- Ohm's law relates current, voltage, and resistance (V=IR).
- Series circuits maintain equal current across all components.
- Parallel circuits split total current among branches.
- Current density is defined as current per unit cross-sectional area.
- Power dissipated in resistor is P=I²R.
- Open circuits result in zero current flow.
- Short circuits cause excessive current due to low resistance.
- Arcing can occur under high current conditions.
- DC current is unidirectional and steady over time.
- AC current alternates direction periodically.
- Inductive reactance increases impedance at higher AC frequencies.
- Capacitive reactance decreases impedance at higher AC frequencies.
- Ground fault current flows to earth in fault conditions.
- RMS current value represents equivalent DC heating effect.
- Peak current is maximum instantaneous value in AC cycle.
- Transient currents occur during switching events.
- Skin effect causes AC current to flow near conductor surface.
- Superconductors exhibit zero resistance, allowing infinite current.
- Current limiting devices protect circuits from overload.
- Galvanometers measure very low currents with high sensitivity.
- Electrochemical cells use ionic current in electrolytes.
- Thermionic emission enables current in vacuum tubes.
- Photocurrent is generated when light dislodges electrons.
- Leakage current flows through insulators under high voltage.
- Switching transients can generate high-frequency current pulses.
Keywords: electric current quiz, current fundamentals, SI unit amperes, conventional vs electron flow, series and parallel current, Ohm's law quiz, current density definition, AC vs DC current, skin effect, superconductivity current, RMS current, current measurement quiz
